Composition roof paint



Patented Feb. 3, 1931 RATENT FFEQ JOSIAH D. VIA'LSTON, OF BRAINERD, IVIINNESOTA; ASSIGNOR TO BLACK DIAMOND PAINT COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA COMPOSITION ROOF PAINT No Drawing. 1 Application filed September 8, 1927. Serial No. 218,362.

This invention relates to paintcomposinon-liquid ingredients being liquidized by tions and more particularly to a root paint. the addition of gasoline and kerosene.

One of the objects of the present invention 2. A paint composition in which are inis to provide a root paint which will be exeluded an intimate mixture of coal tar, rosin, 5 ceptionally durable and proof against cracklit-harge, zinc sulphate, and calcium sulphate, ing or softening and running under heat. in substantially the proportions of coal tar Anoth r Obj t f th i v ntio i to p o- 50 gallons, pulverized rosln 6 pounds, lltharge vide a roof paint composition which will pos- 8 pounds, Zinc sulphate 2 pounds and calcium sess a desirable degree of elasticity and will sulphate 2 pounds, the powdered and non- 10 be capable of filling in the more or less Worn liquid ingredients being liquidized by the adn surface portions of metal roots which have dltion of gasoline and kerosene in equal parts. become corroded, thereby preventing further In testimony whereof I affix my signature, corrosion or rusting of the roofing material JOSIAH D. WALSTON. and preventing leaks.

Another object of the invention is to pro- 65 vide a roof paint which will be fire resisting and more durable than ordinary roof paint compositions.

The paint composition of the present invention comprises an intimate mixture of the 20 following ingredients in substantially the proportions stated:

Coal tar gal. Pulverized rosin 6 lbs. Litharge 8 lbs. Zinc sulphate 2 lbs. Calcium sulphate 2 lbs.

In preparing the mixture the zinc and cal- 30 cium sulphate and the litharge are thoroughs ly mixed and incorporated in the coal tar, together with PLllVOllZGCl rosin, and the incorporation of these ingredients in the coal tar is facilitated by the addition, to the mix- 35 ture, of a suitable proportion of a mixture of gasoline and kerosene, in equal parts.

It will be understood, of course, that any suitable coloring matter may be incorporated in the paint mixture, and the mixture is applied to the surface to be protected, in the usual manner, the invention contemplating the application of the composition to old and worn metal roots, as well as to new metal roofs, and composition roofs.

Having thus described my invention, what is claimed as new is 1. A roof paint in which are included an intimate mixture of coal tar, rosin, litharge, zinc sulphate and calcium sulphate, the coal 5G tar being preponderant, the powdered and 

